INTRO(4)               OpenBSD Programmer's Manual (SGI)              INTRO(4)

NAME
     intro - introduction to special files and hardware support

DESCRIPTION
     The manual pages in section 4 describe the special files, related driver
     functions, and networking support available in the system.  In this part
     of the manual, the SYNOPSIS section of each configurable device gives a
     sample specification for use in constructing a system description for the
     config(8) program.  The DIAGNOSTICS section lists messages which may ap-
     pear on the console and/or in the system error log /var/log/messages due
     to errors in device operation; see syslogd(8) for more information.

     This section contains both devices which may be configured into the sys-
     tem and network related information.  The networking support is intro-
     duced in netintro(4).

DEVICE SUPPORT
     This section describes the hardware supported on the sgi platform.  Soft-
     ware support for these devices comes in two forms.  A hardware device may
     be supported with a character or block device driver, or it may be used
     within the networking subsystem and have a network interface driver.
     Block and character devices are accessed through files in the file system
     of a special type; see mknod(8).  Network interfaces are indirectly ac-
     cessed through the interprocess communication facilities provided by the
     system; see socket(2).

     A hardware device is identified to the system at configuration time and
     the appropriate device or network interface driver is then compiled into
     the system.  When the resultant system is booted, the autoconfiguration
     facilities in the system probe for the device and, if found, enable the
     software support for it.  If a device does not respond at autoconfigura-
     tion time it is not accessible at any time afterwards.  To enable a de-
     vice which did not autoconfigure, the system must be rebooted.

     The autoconfiguration system is described in autoconf(4).  A list of the
     supported devices is given below.

HARDWARE
     The following systems are supported:

     Family    Model

     IP27      Origin 200
     IP27      Origin 2000, Onyx 2
     IP30      Octane, Octane 2 (Speedracer)
     IP32      O2, O2+ (Moosehead)
     IP35      Fuel
     IP35      Origin 300, Onyx 300
     IP35      Origin 3000, Onyx 3000

LIST OF DEVICES
     The devices listed below are supported in this incarnation of the system.
     Not all supported devices are listed.

        ahc(4)      Adaptec VL/EISA/PCI SCSI interface
        com(4)      serial communications interface
        gbe(4)      SGI Graphics Back End (GBE) frame buffer
        macebus(4)  Multimedia, Audio and Communications Engine I/O ASIC
        mainbus(4)  SGI main processor bus device
        mavb(4)     Moosehead A/V Board audio device
        mec(4)      MAC-110 10/100 Ethernet device
        power(4)    power button
        xbow(4)     Octane and Origin family XIO bus

     A further list of available devices is contained within the pages de-
     scribing the system buses and controllers.  For example, a PCI device
     would be listed in the pci(4) man page.  The following buses and con-
     trollers list these devices:

        pci(4)        introduction to PCI bus support
        usb(4)        introduction to Universal Serial Bus support

SEE ALSO
     autoconf(4), config(8)

HISTORY
     This sgi intro appeared in OpenBSD 3.6.

OpenBSD 4.6                      May 22, 2009                                2
